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Your search keyword '"Migda, Wojciech"' showing total 3 results
Start Over Author "Migda, Wojciech" Topic modal analysis
3 results on '"Migda, Wojciech"'

1. Modeling of Wood Frame Structures with Different Insulation Materials under Damaging Dynamic Loading.

Author

Szczepański, Marcin, Migda, Wojciech, and Jankowski, Robert

Subjects
*STRUCTURAL frames, *INSULATING materials, *EARTHQUAKE damage, *MODAL analysis, *URETHANE foam, *THERMAL insulation, *DYNAMIC loads
Abstract

Wood frame buildings are very popular in regions that are exposed to different dynamic excitations, such as damaging earthquakes. Their seismic resistance is really important in order to prevent structural damages and human losses. This paper presents the results of advanced numerical investigation carried out using the FEM. Based on the models of wall panels, the numerical model of real structure of the wood frame building has been proposed for two cases of thermal insulation (using polyurethane foam and mineral wool). Then, the modal analysis for both models has been conducted so as to compare the frequencies of natural vibrations. Finally, the linear and nonlinear dynamic analyses have been carried out so as to investigate the structural behavior under damaging earthquake excitation. The results of the numerical investigation clearly confirm the beneficial effect of using polyurethane foam as thermal insulation. This can be seen both in the results of modal analysis (higher natural frequencies of building) and seismic analyses, which resulted in a significant reduction in peak values of displacements and accelerations, as compared to the case when mineral wool is applied. Moreover, the results of investigation confirm that the use of the FEM with detailed representation of material and geometric structural properties together with the Newmark algorithm can be considered as the effective approach so as to obtain the accurate response of wood frame building under dynamic loading. [ABSTRACT FROM AUTHOR]

Published
2020
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2. MODAL ANALYSIS OF REAL TIMBER FRAME HOUSES WITH DIFFERENT INSULATION MATERIALS.

Author

Szczepański, Marcin, Migda, Wojciech, and Jankowski, Robert

Subjects
INSULATING materials, WOODEN-frame houses, URETHANE foam, DAMPING (Mechanics), MODAL analysis
Abstract

The aim of this article is to present the results of a numerical modal analysis of two actual structures of timber frame buildings and the different behaviour due to the used insulation material. One model of the timber structure was filled with mineral wool, while the other with polyurethane foam. During the modal analysis, eigenvalues for both models have been determined. The results of the analysis clearly show the increase of stiffness and damping properties of skeletal constructions achieved by the use of polyurethane foam as the skeleton filling. The numerical model was based on prior experimental test on real scale single frame elements, therefore the result can be assumed to be adequate. [ABSTRACT FROM AUTHOR]

Published
2016
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3. Non-Linear Analysis of Inter-Story Pounding between Wood-Framed Buildings during Ground Motion.

Author

Migda, Wojciech, Szczepański, Marcin, Lasowicz, Natalia, Jakubczyk-Gałczyńska, Anna, and Jankowski, Robert

Subjects
*EFFECT of earthquakes on buildings, *TALL building design & construction, *STEEL walls, *FINITE element method, *MODAL analysis, *MOTION, *REINFORCED concrete
Abstract

Pounding between adjacent buildings during ground motion may result in structural damage or lead to total destruction of structures. The research on the phenomenon has recently been much advanced; however, the analyses have been carried out only for concrete, steel, and masonry structures, while pounding between wooden buildings has not been studied so far. The aim of this paper is to show the results of detailed non-linear seismic analysis of inter-story pounding between the wood-framed buildings modelled by using the finite element method. Firstly, the modal analysis of the structures was conducted. Then, the detailed non-linear analysis of earthquake-induced collisions between two wood-framed buildings of different heights was carried out. The results of the analysis indicate that the behavior of both structures in the longitudinal as well as in the transverse direction is significantly influenced by interactions. The response of the taller building is increased in both directions. On the other hand, the response of the lower building is decreased in the longitudinal direction, while it is increased in the transverse one. The results of the study presented in the paper indicate that, due to deformability of buildings made of wood, structural interactions may change their responses much more, as compared to steel, reinforced concrete, or masonry structures. [ABSTRACT FROM AUTHOR]

Published
2019
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